تخمین سطح تنش رطوبتی خاک با استفاده از مدل HYRDUS2D و سیستم استنتاج عصبی- فازی

کاراندیش, فاطمه; حقیقت جو, پرویز

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ 1- استادیار گروه مهندسی آب، دانشکده ی آب و خاک، دانشگاه زابل (مکاتبه کننده)

² استادیار گروه مهندسی آب، دانشکده‌ی آب و خاک، دانشگاه زابل

چکیده

در این پژوهش، بهمنظور تعیین طول دورهی تنش در طول فصل کشت، قابلیت مدلهای HYDRUS2D و ANFIS در
شبیهسازی روند تغییرات زمانی رطوبت خاک و اجزای بیلان آب تحت آبیاری کامل و کمآبیاری معمولی در دو سطح 75 (DI75) و 55 درصد (DI55) در یک مزرعهی ذرت با یکدیگر مقایسه شدند. بدین منظور، طی دو فصل زراعی دادههای رطوبت خاک با استفاده از رطوبتسنج TRIME-FM برای واسنجی و صحتیابی مدل HYDRUS2D برداشت شد. همچنین، شبیهسازی تغییرات زمانی رطوبت خاک با مدل ANFIS با توابع عضویت مختلف و با متغیرهای مستقل روز بعد از کاشت، ضریب درجه-روز، سطح تنش و عمق آب آّبیاری انجام شد. مقایسهی معیارهای ارزیابیِ جذر میانگین مربعات خطا (mm 2-21/8)، خطای انحراف (mm 6/11-^7-10) و ضریب کارآیی مدل (1-63/0) در شبیهسازیِ طول دورهی تنش، رطوبت و اجزای بیلان خاک، امکان جایگزینی مدل ANFIS با مدل پیچیدهی HYDRUS2D را در شرایط معرفی متغیرهای مستقل مناسب را نشان میدهد. هچنین، علیرغم اعمال زود هنگامتر تیمارها در فصل دوم، عدم تغییر بازهی تنش رطوبتی در تیمار DI75 در دو فصل (از روز 82ام تا انتهای فصل کاشت)، امکان کاهش سطح آب مصرفی و یا تغییر زمان اعمال کمآبیاری را نشان میدهد. بر اساس نتایج این پژوهش، مدل ANFIS میتواند پاسخگوی نیاز در این راستا باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Estimating the water stress in soil using HYDRUS2D and Adaptive Neuro-Fuzzy Interference System

نویسندگان [English]

Fatemeh Karandish ¹
Parviz Haghighatju ²

¹ Assistant Professor, Water Engineering Department, Water and Soil Faculty, University of Zabol, Zabol, Iran

چکیده [English]

Most In this research, the ability of HYDRUS2D and ANFIS models for simulating temporal variations of soil water content and soil water balance components under full irrigation and water deficit irrigation with two levels of 75 and 55 percentage in a maize field were compared to determine water stress duration in the growing season. To do so, soil water content was measured using TRIME-FM TDR sensors during two growing seasons for calibrating and validating HYDRUS2D model. Also, soil water content was simulated using ANFIS with different type of membership functions and using independent variables of days after planting, GDD, irrigation depth and water stress level. Comparing root mean square error, mean bias error and model efficiency coefficient indices for simulating soil water content stress period duration, soil water content and soil water balance components demonstrated the possibility of using ANFIS instead of a complicated model such as HYDRUS2D when defining the suitable independent variables. Despite 10 days sooner application of treatments in second growing season, the same water stress duration under DI75 treatment for both growing season (i.e. since 82 DAP till harvest) shows that it is possible to apply treatments either sooner or with higher intensity when applying deficit irrigation. Based on the results, ANFIS model could be used for these purposes.

کلیدواژه‌ها [English]

ANFIS
Deficit irrigation
GDD
Soil water content
water balance components

مراجع

References

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تحقیقات کاربردی خاک

تخمین سطح تنش رطوبتی خاک با استفاده از مدل HYRDUS2D و سیستم استنتاج عصبی- فازی

مراجع

مراجع

دوره 3، شماره 1 - شماره پیاپی 1
تیر 1394
صفحه 53-64

تخمین سطح تنش رطوبتی خاک با استفاده از مدل HYRDUS2D و سیستم استنتاج عصبی- فازی

مراجع

مراجع

دوره 3، شماره 1 - شماره پیاپی 1تیر 1394صفحه 53-64

دوره 3، شماره 1 - شماره پیاپی 1
تیر 1394
صفحه 53-64